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15.7 km
~3 hrs 52 min
444 m
Loop
The Patapsco Traverse and Old Main Line Loop is a 15.7 km looped trail that starts and ends in Ellicott City, Howard County, Maryland. Based on our data, the hike is graded as Medium. For information on how we grade trails, please read measuring the difficulty of a hiking trail on hiiker. Also, check our latest community posts for trail updates. This hike can be completed in approx 3 hrs 52 mins. Caution is advised on trail times as this depends on multiple variables. For more info read about how we calculate hike time.
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